package com.dataView.util;

/** 
* 地图坐标转换 google,baidu,gps 
* @author lw 
* @Time 2015年4月16日18:19:16 
* 
* */ 
public class CoordinateConversionUtile {
	
	private static final double x_pi = 3.14159265358979324 * 3000.0 / 180.0; 
	
	private static final double pi = 3.14159265358979324; 
	private static final double a = 6378245.0; 
	private static final double ee = 0.00669342162296594323; 

	/** 
	* gg_lat 纬度 
	* gg_lon 经度 
	* GCJ-02转换BD-09 
	* Google地图经纬度转百度地图经纬度 
	* */ 
	public static Point google_bd_encrypt(double gg_lat, double gg_lon){ 
		Point point=new Point(); 
		double x = gg_lon, y = gg_lat; 
		double z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * x_pi); 
		double theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * x_pi); 
		double bd_lon = z * Math.cos(theta) + 0.0065; 
		double bd_lat = z * Math.sin(theta) + 0.006; 
		point.setLat(bd_lat); 
		point.setLng(bd_lon); 
		return point; 
	} 

	/** 
	* wgLat 纬度 
	* wgLon 经度 
	* BD-09转换GCJ-02 
	* 百度转google 
	* */ 
	public static Point bd_google_encrypt(double bd_lat, double bd_lon){ 
		Point point=new Point(); 
		double x = bd_lon - 0.0065, y = bd_lat - 0.006; 
		double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi); 
		double theta =Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi); 
		double gg_lon = z * Math.cos(theta); 
		double gg_lat = z * Math.sin(theta); 
		point.setLat(gg_lat); 
		point.setLng(gg_lon); 
		return point; 
	} 



	/** 
	* wgLat 纬度 
	* wgLon 经度 
	* WGS-84 到 GCJ-02 的转换(即 GPS 加偏) 
	* */ 
	public static Point wgs_gcj_encrypts(double wgLat, double wgLon) { 
		Point point=new Point(); 
		if (outOfChina(wgLat, wgLon)) { 
		point.setLat(wgLat); 
		point.setLng(wgLon); 
		return point; 
		} 
		double dLat = transformLat(wgLon - 105.0, wgLat - 35.0); 
		double dLon = transformLon(wgLon - 105.0, wgLat - 35.0); 
		double radLat = wgLat / 180.0 * pi; 
		double magic = Math.sin(radLat); 
		magic = 1 - ee * magic * magic; 
		double sqrtMagic = Math.sqrt(magic); 
		dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi); 
		dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi); 
		double lat = wgLat + dLat; 
		double lon = wgLon + dLon; 
		point.setLat(lat); 
		point.setLng(lon); 
		return point; 
	} 


	public static void transform(double wgLat, double wgLon, double[] latlng) { 
		if (outOfChina(wgLat, wgLon)) { 
		latlng[0] = wgLat; 
		latlng[1] = wgLon; 
		return; 
		} 
		double dLat = transformLat(wgLon - 105.0, wgLat - 35.0); 
		double dLon = transformLon(wgLon - 105.0, wgLat - 35.0); 
		double radLat = wgLat / 180.0 * pi; 
		double magic = Math.sin(radLat); 
		magic = 1 - ee * magic * magic; 
		double sqrtMagic = Math.sqrt(magic); 
		dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi); 
		dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi); 
		latlng[0] = wgLat + dLat; 
		latlng[1] = wgLon + dLon; 
		} 
		private static boolean outOfChina(double lat, double lon) { 
		if (lon < 72.004 || lon > 137.8347) 
		return true; 
		if (lat < 0.8293 || lat > 55.8271) 
		return true; 
		return false; 
	} 
	private static double transformLat(double x, double y) { 
		double ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.sqrt(Math.abs(x)); 
		ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0; 
		ret += (20.0 * Math.sin(y * pi) + 40.0 * Math.sin(y / 3.0 * pi)) * 2.0 / 3.0; 
		ret += (160.0 * Math.sin(y / 12.0 * pi) + 320 * Math.sin(y * pi / 30.0)) * 2.0 / 3.0; 
		return ret; 
	} 
	private static double transformLon(double x, double y) { 
		double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.sqrt(Math.abs(x)); 
		ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0; 
		ret += (20.0 * Math.sin(x * pi) + 40.0 * Math.sin(x / 3.0 * pi)) * 2.0 / 3.0; 
		ret += (150.0 * Math.sin(x / 12.0 * pi) + 300.0 * Math.sin(x / 30.0 * pi)) * 2.0 / 3.0; 
		return ret; 
	} 
}